Index: sys/fs/ext2fs/ext2_extents.c
===================================================================
--- sys/fs/ext2fs/ext2_extents.c
+++ sys/fs/ext2fs/ext2_extents.c
@@ -297,6 +297,10 @@
 		error_msg = "header: invalid eh_entries";
 		goto corrupted;
 	}
+	if (eh->eh_depth > 5) {
+		error_msg = "header: invalid eh_depth";
+		goto corrupted;
+	}
 
 	return (0);